Aliases for KCNU1 Gene
External Ids for KCNU1 Gene
Previous GeneCards Identifiers for KCNU1 Gene
This gene encodes a member of the potassium channel family of proteins. The encoded voltage-gated ion channel allows the outward flow of potassium ions during plasma membrane hyperpolarization in sperm. Opening of this channel may be regulated by calcium ion levels. Homozygous knockout mice that lack the related mouse gene exhibit male sterility. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]
GeneCards Summary for KCNU1 Gene
KCNU1 (Potassium Calcium-Activated Channel Subfamily U Member 1) is a Protein Coding gene. Among its related pathways are Hepatic ABC Transporters and Activation of cAMP-Dependent PKA. Gene Ontology (GO) annotations related to this gene include ion channel activity and potassium channel activity. An important paralog of this gene is KCNMA1.
UniProtKB/Swiss-Prot for KCNU1 Gene
Testis-specific potassium channel activated by both intracellular pH and membrane voltage that mediates export of K(+). May represent the primary spermatozoan K(+) current. In contrast to KCNMA1/SLO1, it is not activated by Ca(2+) or Mg(2+). Critical for fertility. May play an important role in sperm osmoregulation required for the acquisition of normal morphology and motility when faced with osmotic challenges, such as those experienced after mixing with seminal fluid and entry into the vagina.
Calcium (Ca2+) -activated potassium channels (KCa) are a group of 6/7-TM ion channels that selectively transport K+ ions across biological membranes. They are broadly classified into three subtypes: SK, IK and BK channels (small, intermediate and big conductance).